How to Write a Sample letter

This is the letter to convey my apology to enemy for making a good friendship and to forget the old things that I have done. First of all I should regret for my behaviour and I regret for it in a very precise manner. We both knows that we were been enemies from the beginning of the college. I have analysed well that am the person who makes some mistakes while studying in college days. I don’t wish to continue that. Now I request you to condone me for my actions and I’ll correct my mistake and I’ll never let this to happen one more time. I thank you for the experience you have provided. I will never commit this mistake again. I request you to accept my obligation to accept me as your friend.